Press-door counter-balance



Jan. 16, 5 PERRY PRESS DOOR COUNTER BALANCE Filed 0C(,. 12, 1931 2 Sheets-Sheet l [T ammmtm j Fran/ Perry Jan. 16, 1934. 5 PERRY 1 ,943,695

PRESS DOOR COUNTER BALANCE Filed Oct. 12, 1931 2 Sheets-Sheet 2 Patented Jan. 16, 1934 I I UNITED STATES PATENT OFFICE-f 1,943,695 PRESS-DOOR) COUNTER-BALANCE Frank S. Perry, German, Tex.

. Application October 12, 1931. Serial No. 568,491

3 Claims. (01. 100-19) This invention relates to new and useful imbeams. The standards are further secured by provements in press-door counter-balances. angular braces 14. The standards constitute One object of the invention is to provide an supportsand may be of any suitable construction improved counter-balance for the door of a press andfastened on the beams in any suitable man- 5 box of the type'in whichthe door is hinged at ner. v co its bottom and swings outwardly and down- A transverse fulcrum bar or shaft is fa s- .wardly, such asaroused on cotton presses and tened in the plates 13 and connects the tops of the like. the standards. A pair of counter-balances are A particular object of the inventionis to promounted on the shaft and each includes an elon- ,10 vide a counter-balance which will be entirely out gated bar or lever 16 which is journaled near as of the way of the workmen when the door is its center on the shaft, a weight 17 slidably closed and which may be mounted above the press mounted on the lever, and hangers 18 also jourbox so as to utilize a space ordinarily not used. naled on said shaft and suspending said weight.

Another object of the invention is to provide Each lever has an integral bearing box 19, 15 a counter-balance in which the balancingwill whereby an amplified bearing surface on the 7o be the same at substantially all positions of the shaft 15 is provided. The box is rotatably condoor, thus eliminating strong points and weak fined between collars 20 fastened on said shaft. points in the swinging arc of the door and mak- Each hanger has an eye 21 hinged on the shaft ing for easier and safer handling of the door. and.- its lower portion is screw-threaded and tele- 520 A further object of the invention is to proscopes a recess 22 in the side of the weight 17, 7 5

vide a counter-balance which may be entirely as is shown in Figures 3 and 4. Angular stirdetached from the press-box door when the door rups 23 embedded in the upper end of each weight is closed and while the box is being swung from are adjustably supported on the hangers by nuts one position to the other. 24;. By adjusting the nuts the weights are raised 5 A construction designed to carry out the invenor lowered, thus varying their distance from the so tion will be hereinafter described together with shaft or fulcrum 15. other features of the invention. On the upper end of each lever is fastened a The invention will be more readily underclevis 25 and each clevis has an eye 26 extending stood from a reading of the following specififrom one edge of the lever. One clevis is directed 139 cation and by reference to the accompanying oppositely from the other, whereby the eye of 8 5 drawings in which an example of the invention each overhangs one of the doors B on the opposite is shown, and wherein: sides of the press-box C. A flexible connection Figure 1 is a side elevation of a portion of a such as a cable, chain or rope 27 is provided for press-box and its frame equipped with a countereach lever. I have illustrated ropes in the drawbalance constructed in accordance with the inings, and each rope has its upper end looped and 90 vention, fastened to the eye 26 of one of the clevises.

Flgm'e 2 15 an end elevatlon of the Same, Each rope has a hook 28 at its lower end.

the doors and counter-balance being shown in While each hook 23 may be engaged with its the closed posltlon m fun lmes and m a respective door in any suitable manner, I prefer 340 many Open position in dotted lines to mount in each cleat D, an eye bolt 29, and en-- 35 Figure 5 is a perspective view of one of the i f ggg 3 1S sectlonal detafl of one of the gage the hooks in these eyes. It will be seen that Figure 4 is a horizontal cross-sectional view of one of the eye bolts W111 be spaced mwardly from the end of the door so that the ropes may hang one of the weights, and

1n the vertical planes of the levers 16. 100 By making the distance from the fulcrum shaft In the drawings the numeral 10 designates an 15 to each eye 26, substantially equal to the disend standard and 11 a similar standard. Each m from the hinge of a door to the eye standard has a transverse channel bar 12 at its of lts bolt the arcs 1n Whlch the eyes 26 and clevises.

.59 b tt d a gusset plate 1 t t t The 29 swing will each have the same radius. Then .195

standards are mounted transversely across the by adjusting the nuts 24 that t Weights top beams A of the press frame, The bar 12 are spaced a sufficient distance from the fulcrum are suitably fastened to the beams, the stand- S ft 5 t0 C nt a the Weight of t ard 10 being at one end of the beams and the doors, said doors may be easily swung and safely -1 .55 standard 11 spaced inwardly therefrom on said openedancl closed. This arrangement will give an even counter-balancing of the doors at all positions of their swing.

When the doors are fully open and slightly below the horizontal the initial lift by the workmen will not require any more energy than that necessary to swing the doors at any other position, when closing the same; also the latter part of the downward swing will not require any more resistance by the workmen than any other position of the said swing. When the doors are closed the hooks 28 may be disengaged from the eye bolts 29 and the press-box freely swung. The entire device is out of the way and all parts except the ropes are mounted above the press-box.

Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of the appended claims.

Having illustrated and described a preferred form of the invention, what I claim, is:

1. In a counter-balance for a press-box door, an upright support, a shaft carried by the support, an elongated lever pivoted intermediate its ends on said shaft, hangers pivoted on the shaft, a weight slidably confined on the lever, stirrups on the weight engaging the hangers, a clevis at the upper end of the lever, and a flexible connection suspended from the clevis and having a hook at its lower end.

2. A counter-balance for press box doors comprising, a pair of upright standards, a shaft extending between and carried by the upper ends of said standards, an elongated lever journaled. on the shaft at its mid-portion, the lower end of the lever terminating short of the bottoms of the standards, a weight mounted on the lower end of the lever, and a flexible connection having one end secured to the upper end of said lever and provided at its opposite-end with means for attaching it to a press-box door.

3. The combination with a press-box having upright doors on opposite sides thereof mounted to swing downwardly, a pair of upright standards mounted on top of the box relatively between the doors, a shaft extending between and carried by the upper ends of the standards, said shaft being disposed longitudinally of said doors, a pair of elongated levers journaled at their mid-portions on the shaft, the lower end of each lever terminating short of the bottoms of the standards and above the top of the press-box, each lever having a weight at its lower end and a flexible connection extending from its upper end, one of said flexible connections being attached to the upper portion of the door on one side of the box and the other flexible connection being attached to the upper portion of the door on the other side of the box.

FRANK S. PERRY. 

